勇洙对印鼠客蚤杀灭效果试验研究

Studies on the Toxicity of Alphacypermethrin to Xenopsylla cheopis

目的 观察杀虫剂勇洙对印鼠客蚤实验室的杀灭效果。方法 采用瓶膜法进行试验。结果 （1）半数致死浓度LC50：0．002 19432％（0．00204313％～0．00235670％）；（2）随着药物浓度的逐渐增加，KT50呈现有规律的缩短，24h死亡率也逐渐增高；（3）当药物浓度为0．005％，0．01％时，KT50在6min以内，8min内击倒率均大于80．0％，24h死亡率均大于84．0％；（4）残效：0．005％，0．01％两种浓度120d内残效实验30min内的击倒率均为100．0％，24h死亡率均大于76．0％。结论 勇洙10％悬浮剂对印鼠客蚤杀灭效果较好，具有高效、速杀、残效较好等优点，可用于大面积灭蚤。

Objective To study the toxicity of Alphacypermethrin to Xenospylly cheopis at the laboratory. Methods The residual smearing method was taken in the experiment. Results （ 1 ） The LC50 of Alphacypermethrin was 0.002 194 32% （ 0. 002 043 13% - 0. 002 356 70% ）. （ 2 ） The KT50 was getting shorter with the concentration gradually decreasing, and the death rates of 24 hours were getting higher. （ 3 ） When the concentration of Alphacypermethrin were 0. 005% and 0.01% ,the KT50was less than 6 minutes, and the shoot - down rate of 8 minutes more than 80.0% and the death rate of 24 hours more than 84.0%. （4） When the concentration of Alphaeypermethrin were 0.005% and 0.01%, the shoot - down rate of 30 minutes in 120 days was 100%, the death rates of 24 hours in 120 days were more than 76.0%. Conclusions The toxicity of Alphacypermethrin to Xenospylly cheopis is very good and Alphacypermethrin can be used to control the plague in the field.